Real-Time Payments Platform Engineer

A8 Core; Northern (KY); Hybrid; USD 120,000 - 160,000; Full time

Job summary

Financial Infrastructure, Inc. is building the A8 Core™ platform for real-time money movement across ACH, wires, RTP, and internal transfers. This role focuses on funding integrations, ensuring 1:1 settlement and instant posting with idempotent processing.

Join a team that owns end-to-end funding rails, with observability and reliability at the core. Remote-friendly in the United States, reporting to the Principal Software Architect.

Qualifications

• 5+ years in backend or platform engineering, with production payments experience.
• Direct experience with at least one major rail (ACH, wire, or RTP).
• Strong .NET / C# and event-driven systems.
• Reliability mindset: idempotency, retries, and reconciliation.

Responsibilities

• Build and operate integrations to payment rails and partners.
• Implement real-time funding so balances update on post.
• Guarantee idempotent processing across retries and duplicates.
• Emit accurate webhooks and handle returns, reversals, and exceptions.
• Reconcile funding activity against ledger and rail reporting.
• Instrument funding path for end-to-end observability.

Skills

Backend engineering

Payments systems

C# / .NET

Event-driven

Reliability mindset

Rail integrations

Tools

Azure

Kubernetes

SQL

Git

Job description

Financial Infrastructure, Inc. is building the A8 Core™ platform for real-time money movement across ACH, wires, RTP, and internal transfers. This role focuses on funding integrations, ensuring 1:1 settlement and instant posting with idempotent processing.

Join a team that owns end-to-end funding rails, with observability and reliability at the core. Remote-friendly in the United States, reporting to the Principal Software Architect.